dandem Posted June 3, 2008 Share Posted June 3, 2008 HELP---PLEASE!I am using a Canon XSI (great camera). Both my Sigma lenses are not giving me the perfect sharpness that I am looking for everytime I take pictures. I have not found that the XSI is any worse on sharpness than the previous XTI that I owned. Please can someone with more exreience on lenses give me some input on Sigma lenses.Thanks, Lawrence Link to comment Share on other sites More sharing options...
steve torelli Posted June 3, 2008 Share Posted June 3, 2008 No camera and lens combination will give you "perfect sharpness every time". You have to do your part. You have inadvertently brought up a problem many people suffer from today i.e., they think their equipment takes their pictures for them. There are simply too many variables in your situation to give a useful answer. You should post some examples. Link to comment Share on other sites More sharing options...
dandem Posted June 3, 2008 Author Share Posted June 3, 2008 Okay, Steve...here's an example. I take a picture of a subject - a flower for example. Its very sharp. I then take some shots of different subjects, go back to the same flower with the same camera settings, same lighting etc, and it's not as sharp as the original flower shot. I'm not asking the camera to do the work - I'm trying to understand if there is a problem with my lenses! Link to comment Share on other sites More sharing options...
alfonso e. perez-gonzalez Posted June 3, 2008 Share Posted June 3, 2008 What do mean by "same settings"? Does this include the focus? Are you relying on atuo-focus? What are the lighting conditions? Does the lens "hunt" for focus? What is the aperture? What is the ISO sensitivity setting on the camera? How are you metering....etc etc etc... Link to comment Share on other sites More sharing options...
dandem Posted June 3, 2008 Author Share Posted June 3, 2008 Hi Alfonso. Both pictures of the flower were taken within 10 minutes of each other. In shade on a sunny day. ISO 200, spot metering, 125/sec at f-11. Yes, the lens did "hunt" for focus. Thanks for the response. Link to comment Share on other sites More sharing options...
bob_camarena Posted June 4, 2008 Share Posted June 4, 2008 I find that manual focus mode is the best for close-up work and for portraits. Link to comment Share on other sites More sharing options...
dandem Posted June 4, 2008 Author Share Posted June 4, 2008 Thanks, Bob Link to comment Share on other sites More sharing options...
axel-cordes Posted June 5, 2008 Share Posted June 5, 2008 Check out this to test your tools: http://www.photo.net/learn/focustest/ Regards Axel Link to comment Share on other sites More sharing options...
dandem Posted June 5, 2008 Author Share Posted June 5, 2008 AWESOME...thanks so much, Axel Link to comment Share on other sites More sharing options...
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